Tool-holder for lathes



(Md1"v o.. MLLER. l l TooL OLDER FIOR LATHES. No. 272,304. Patented Feb. 13,1883.

m Pnns. Mmmm wamngmn, nA c.

F UNITED STATES j PATENT OFFICE.

CONRAD MLLER, oF COLUMBUS, OHIO.

TOOL-HOLDER LATHES.

SPECIFICATION forming partrof Letters Patent No. 272,3;04, dated February 18, 1883.

Application led July 15, A1.8852. (Model.) i

-To all whom ttmay concern:

Be it known that I, CONRAD MLLER, of Columbus, in the county of Franklin and State Ot Ohio, have invented a new and Improved' Tool-Holder for Lathes, ot' which the following is a full, clear,.and exact description.

The object of my invention' is to provide a newand improvedrdevice for holding and adjusting the cutting-tool of a lathe in such a manner that it will be held firmly and can be adjusted very nicely and accurately without being affected by theinaccuracies and lost moi tion ot' the screw-spindle for moving the toolholding block.

The invention consists in a screw and nuts mounted thereon for adjusting the tool-holding block or slide of a lathe within the limits of the lost motion ofthe main spindle, which nuts have graduated collars to facilitate their accurate adjustment.

The invention further consists in a crosspiece in which this adjusting-screw isjournaled, which cross-piece is provided with devices for locking it in position.

The invention also consists iu a wedge pro vided with a squared aperture, combined with an eccentric disk for moving the wedge to lock or unlock the cross-piece.

Reference is to be had to the accompanying drawings, forming part of this'specification, in which similar letters of reference indicate corresponding parts in all the ligures. v

Figure l is a plan view ot a tool-holder for a lathe provided with my improvement. Fig. 2 is a longitudinal sectional elevation of the same on the line x at, Fig. 1. Fig. 3 is an end elevation of the same, parts being shown in section. Fig. 4 is an inside elevation of the wedge for locking the tool-holding block or slide in place. I

A sliding block, A, provided in `its bottom with a transverse dovetailed recess, rest's on the dovetailed tracks B of the frame, which tracks pass yinto the dov,etailed groove in the bottom ot' the block or slide A.. A screwspindle, G, passing into a, nut, D, in the bottom of the block or. slide A, is journaled in the end of the frame, and is provided with a crank-handle, E, or a handwheel for turning it, and thereby moving the slide or block l the pintle Min such a manner that the eccenrco A forward or backward. The block Ais pro- (Shown in dotted lines iu Fig. l.) lA crosspiece, F, provided in its `bottom with a dovetailedrecess, rests on the tracks B. A screwspindle, G, which is held to turn in the block A, but cannot move longitudinallyin the same, passes through the Grossi-piece F, and onit nuts H and H are mounted on opposite sides, which nurs have graduated collars h h. A- wedge, J, is placed between one of the shanks of the cross-piece'F and the outer surface of one of the tracks B, and this Wedge is provided with a square or oblong aperture, K, in which a disk, L, is located, which is eccentrically mounted on the inner end ot' pintle M, passing through thisshank of the crossfpiece F, and having its outer end squared, so that a key will lit thereon. The spindle C is provided with a rigidly-mounted collar, N, to prevent al movement or"- this spindle in the direction of its length.

The operation is as follows: The block or slide A is moved on the tracks B by turning the spindle C; but as this spindle has some lost motion the cutting-tool cannot be adj usted very nicely and accurately, especially in cutting screw-threads. To accomplish this I have provided vthe screw G and the nuts H H'. When the tool has'been adjusted vby means of the spindle C, thev cross-piece F is locked in place on the tracks by turning the pintle M in -such a manner that the eccentric disk L will push the WedgeJ in between the'shankof the cross-piece and the-outer surface of the track. If the block A is then tobe moved slightly in the direction of thearrow a', the nut H is so adjusted that its inner end will be from the corresponding side of the cross-piece F the distance the block A is to be moved. Then the nut H is turned, whereby the block A will be moved in the direction ot the arrow a untilv the inner end of the nut H rests against the cross-piece F. In a similar manner the block A can be moved in the inverse direction -of the arrow a. by the screw-spindle C the cross-piece F must be loosened, which is accomplished by turning Before the blockA can be moved tric disk L loosens the wedge J. Itis evident that the adjustment of the block A by means of the screw G and the nuts H H can only be very minute, as it must remain within the limits of the lost motion of the spindle C. To ta cilitete these minute adjustments I have provided the nuts H H with the gradnntions.

This device can also be used in planing and smoothing machines, or other machines for a like purpose.

Having thus full;r described my invention, I claim as new and desire to secure by Letters Patent- 1. In e device for adjusting the position of the tool on n inthe, the combination, with n tool-bolder block or slide and means for ad justing` the sinne, of a screw-spindle swivcled to the said block or slide, and provided with nuts for taking up the motion lost in the first' adjustment,substantially as herein shown and described.

2. In n lathe, the combination, with the siide or block A und the screw-spindie C, of the crosspiece Ii, the screw G, and the nuts H H' thereon, substantially as herein shown and described, and for the purpose set forth.

3. In a lathe, the combination, with the slide or block A and the screw-spindie C, of" the crosspicoe F, the screw G, and the nuts H II, mounted thereon, and provided with graduetions on their collars, substantially as herein shown and described, and for the purpose set forth.

4. In e lathe, the combination, with the'slide or block A end the screw-spindle C, of the crosspiece F, the screw G, the nuts H H', and a device for locking the cross-piece F in position on the tracks, substantially as herein shown and described, and for the purpose set forth.

5. In a lathe, the combination, with the slide or block A end the screw-spindle C, of the cross-piece F, the screw G, the nuts H H", and the wedge J between one shank of the frame F and one ofthe tracks of the frame, substantially as herein shown nud f'lescribed, and i'or the purpose set forth.

G. In einthe, the combination, with the slide or block A. and the screw-spindle C, ot' the cross-piece F, the screw G, the nuts H H', the wedge J, and devices for adj ustin g this wedge, substantially ns herein shown and described, and for the purpose set forth.

7. In Mathe, the combination, with theslide or block A and the screwspindle U, ot' the cross-piece F, the screw G, the nuts H H, the wedge J, provided with a squared aperture, K, the eccentric disk L in this aperture, and the pintle M, on which this disk is mounted, substantially as herein shown and described, and for the purpose set forth.

CONRAD MLLER.

\f\"'itnesses:

IHEOPHILES DILL, FERDINAND BUELLon. 

